Last weekend, the annual Thurston Balloon Classic was staged in Meadville, PA. Always a popular attraction for folks in the northwest part of the state, it begins on a Thursday night with a "night light-up" with as many as a dozen balloons participating.
They are, of course, anchored, but the burners are lit and create quite a pleasing spectacle one doesn't see often or everywhere. Part of the display includes synchronizing the firing in sequence. Nice family outing.